/Engine/Source/Runtime/Core/Public/Internationalization/Text.h
https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/StringHandling/FString/
static [FText](API\Runtime\Core\Internationalization\FText) AsCurrency ( int32 Val, const [FString](API\Runtime\Core\Containers\FString) & CurrencyCode, const [FNumberFormattingOptions](API\Runtime\Core\Internationalization\FNumberFormattingOptions) *const Options, const FCulturePtr & TargetCulture )